header{
    width: 100%;
    height: 50px;
    background-color: orange;
    position: relative;
    .content{
        width: 100%;
        line-height: 45px;
        display:flex;
        justify-content:space-between;
       
    }
    .site{
        font-size: 0.27rem;
    }
    span{ 
        font-size: 0.27rem;
    }
    .user img{
        width: 0.34rem;
        height: 0.34rem;
        position: absolute;
        right:30px;
        top:4px;
    }
}
.mall_nav {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    margin: 10px 20px;
    .nav_list {
        border: 1px solid #888;
        padding: 5px;
        margin: 8px;
        a {
            img {
                width: 15px;
                height: 15px;
                display: inline;
            }
        }
    }
}